<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        html,body{
            height:100%;
            text-align: center;
            font-size: 100px;
        }
    </style>

    <script>
        var num = 1;
        function gogogo(){
            if(num%7==0){
                document.body.innerHTML = num + "过";
            }
            else if(num%10==7){
                document.body.innerHTML = num + "过";
            }
            else if((Math.floor(num/10))%10==7){
                document.body.innerHTML = num + "过";
            }
            else{
                document.body.innerHTML = num;
            }
            num++;
        }
    </script>
</head>
<body onclick="gogogo()">

</body>
</html>